Grim won’t leave

My experiences with Grim tell me that Grim leaves when Grim wants to leave!  I think Grim scans the residence or lot to see if there are children (grims dislikes them by nature??)  to destroy dollhouses.  Appears to be something Grim likes to do! 😜

I had that happen to me. I added grim to my household by right clicking on him with testingcheats on. I reset him, then I teleported him off the lot. Finally, I removed him from my household and in a few seconds he went away. And he still reaps sims normally after doing this. 

You can always save before doing this and then test kill a sim of yours and see if reaper is working correctly, then exit the game without saving. If all worked well do the steps again just don’t kill anybody this time.

He doesn’t even do that he literally just stands there doing nothing

My issue happens every single time he reaps a sim and has done for a few months now. I have done them steps before to fix it but I shouldn’t have to which is why I’ve reported it.